Add log4net logging (#89)

* logging + fixed proxy isses

* Add more logging

* comments

* 1.0.3.1

examples/WireMock.Net.Console.NETCoreApp/nlog.config

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
+      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+      autoReload="true"
+      internalLogLevel="info"
+      internalLogFile="c:\temp\wiremock-internal-nlog.log">
+
+  <targets>
+    <!-- write logs to file  -->
+    <target xsi:type="File" name="all" fileName="c:\temp\wiremock-${shortdate}.log"
+            layout="${longdate}|${event-properties:item=EventId.Id}|${uppercase:${level}}|${logger}|${message} ${exception}" />
+  </targets>
+
+  <!-- rules to map from logger name to target -->
+  <rules>
+    <logger name="*" minlevel="Debug" writeTo="all" />
+  </rules>
+</nlog>